... friction braker and planet gearbox decelerator.2.Gearbox ZCM3.12-12500/B-F-K-Y three grade hydraulic transmission is specially developed for ... compatibility, compact structure, characteristics of big reduction ration, low speed, high torque, small size, light, convenient install, reliable working, ect. To ... –46219486.5A2F12W6.1–580 ZCM Two, Three, Four Grade Hydraulic Transmission(Gearbox)